Here's one that really will get you digging into the history
books, and one that most people would had never known
about...
The first air-conditioned buses in Singapore were bought in not by
SBS, not by TIBS, and not by any other private bus company, but
by...
Singapore Traction Company (STC)!
Yes, STC brought a fleet of Isuzus (if I'm not wrong, their last
mass purchases before they went belly-up in 1971), and two of the
buses (registered STC 1 and STC 2, if I'm not wrong) were fitted
with air-conditioning. These two are, rightfully, the first
air-conditioned buses ever in Singapore, and also the first
air-conditioned public buses in Singapore. The fate of these two
buses after the fall of STC is pretty much unknown. Whether it
survived long enough to become part of SBS' (now SBS Transit) first
fleet of buses is unclear, but if it did, then it could also
rightfully claim the title of SBS' first air-conditioned buses in
it's fleet, way before the air-conditioned OF1413s, CAC "Baco"
Victories, the demonstartor B10M with air-conditioning (all
appearing around the mid-1980s), and so on.